John Wall (inventor)
John Wall (26 June 1932 – 27 January 2018)[1][2] was an English design engineer, amateur astronomer, and amateur telescope maker. He was a member of the British Astronomical Association until his death in 2018. He was known for designing dialyte based refracting telescopes, coming up with the Zerochromat.[3]
John Wall | |
|---|---|
 John Wall | |
| Born | 26 June 1932 |
| Died | 27 January 2018 (aged 85) Coventry, Warwickshire, England |
| Occupation | Engineer |
| Engineering career | |
| Significant design | Crayford focuser |
| Significant advance | dialyte based refracting telescopes |
Wall died on 27 January 2018 in Coventry, Warwickshire at the age of 85.
John Wall (inventor) Media
Drawings for the Crayford focuser
References
- ↑ "John Wall". web.archive.org. 6 March 2012. Archived from the original on 6 March 2012. Retrieved 30 January 2018.
{{cite web}}: CS1 maint: bot: original URL status unknown (link) - ↑ "Wikispaces". cmhas.wikispaces.com. Archived from the original on 2018-09-20. Retrieved 2019-02-15.
- ↑ "John Wall refractor - Hanwell Community Observatory". www.hanwellobservatory.org.uk.
Other websites
- A New Refractor Concept: "The Wall Hypochromatic Refractor"
- The John Wall 30-inch refractor.
- The Crayford eyepiece mounting by John Wall - Journal of the British Astronomical Association, 81 (2), 118, February 1971 Archived 2013-01-13 at Archive.today
- Crayford focusers
- Crayford Eyepiece Mount Archived 2009-08-05 at the Wayback Machine
- astronomics.com's description of how the Crayford Focuser works Archived 2007-10-10 at the Wayback Machine